From 69e0fa3603a6daa21e104d0d2ab5a5598c395195 Mon Sep 17 00:00:00 2001
From: Alsu <74852806+alsugiliazova@users.noreply.github.com>
Date: Tue, 24 Mar 2026 15:07:39 +0000
Subject: [PATCH] Add support for conditional retrieval of Data Lake catalogs
 in system tables

---
 src/Interpreters/DatabaseCatalog.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Interpreters/DatabaseCatalog.cpp b/src/Interpreters/DatabaseCatalog.cpp
index f88615ca8429..24e57b5c1098 100644
--- a/src/Interpreters/DatabaseCatalog.cpp
+++ b/src/Interpreters/DatabaseCatalog.cpp
@@ -84,6 +84,7 @@ namespace Setting
 {
     extern const SettingsBool fsync_metadata;
     extern const SettingsBool allow_experimental_analyzer;
+    extern const SettingsBool show_data_lake_catalogs_in_system_tables;
 }
 
 namespace MergeTreeSetting
@@ -2196,9 +2197,12 @@ std::pair<String, String> TableNameHints::getExtendedHintForTable(const String &
 
 Names TableNameHints::getAllRegisteredNames() const
 {
-    if (database)
-        return database->getAllTableNames(context);
-    return {};
+    if (!database)
+        return {};
+    /// DataLakeCatalog::getAllTableNames lists all tables from remote catalog - expensive. Skip when user opted out.
+    if (database->isDatalakeCatalog() && context && !context->getSettingsRef()[Setting::show_data_lake_catalogs_in_system_tables])
+        return {};
+    return database->getAllTableNames(context);
 }
 
 }